Why is the Nissan key light on?

[LaSkylar]

When the Nissan key warning light comes on, it indicates an issue with the car's anti-theft system or the vehicle key. The most common reason is that the smart key battery is depleted. In this case, you need to replace the battery in the car key. Once the battery is successfully replaced, the key light issue will be resolved. Mechanical door lock: It is responsible for preventing the vehicle doors from opening automatically while driving, but it does not serve as an anti-theft function. The anti-theft system includes a steering lock that secures the car's steering column. Both the steering lock and ignition lock are located under the steering wheel. If there is no vehicle key: If the car door is forcibly opened by a thief and the ignition is started, the steering lock will prevent the car from turning, making it impossible to drive away. Additionally, other components like clutch/brake locks and wheel locks also belong to the anti-theft system. Following the principle of "one lock, one key," these measures ensure the safety of the vehicle.